add gitignore for android folder
add gitignore for android folder

inProgress-team/react-native-youtube,paramaggarwal/react-native-youtube,drivetribe/react-native-youtube,drivetribe/react-native-youtube,inProgress-team/react-native-youtube,inProgress-team/react-native-youtube,paramaggarwal/react-native-youtube,drivetribe/react-native-youtube